Azure Course: How does Azure Load Balancer work and what are its benefits? | Intellipaat

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Azure

Azure Load Balancer is a network load balancer service that distributes incoming network traffic across multiple virtual machines (VMs) or network interfaces in a backend pool. It is a Layer 4 (TCP/UDP) load balancer that can balance both internal and external traffic.

Here’s how Azure Load Balancer works:

  1. Traffic is received by the Load Balancer’s frontend IP address and port.
  2. The Load Balancer selects a backend pool and a healthy VM or network interface in that pool.
  3. The Load Balancer routes the traffic to the selected VM or network interface in the backend pool.
  4. The VM or network interface responds to the traffic and sends it back to the client through the Load Balancer.

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The benefits of using Azure Load Balancer include:

  1. High availability: Azure Load Balancer can distribute traffic across multiple VMs or network interfaces, ensuring that your application is always available and responsive.
  2. Scalability: Azure Load Balancer can automatically scale up or down based on traffic demand, allowing your application to handle large amounts of traffic without manual intervention.
  3. Security: Azure Load Balancer can help protect your application from distributed denial of service (DDoS) attacks by filtering traffic based on source IP address and protocol.
  4. Health monitoring: Azure Load Balancer can monitor the health of your VMs or network interfaces and automatically remove unhealthy instances from the pool.
  5. Flexible configuration: Azure Load Balancer provides a range of configuration options, including load balancing rules, health probes, session persistence, and floating IP addresses, to meet the specific needs of your application.

In summary, Azure Load Balancer is a network load balancing service that distributes traffic across multiple VMs or network interfaces, providing high availability, scalability, security, health monitoring, and flexible configuration options.